<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRole">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row v-for="(item1,i1) in scope.row.children" :key="item1.id" :class="['bdBottom', i1 === 0 ? 'bdTop' : '', 'vcenter']">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过 for 循环渲染二级权限 -->
                <el-row v-for="(item2, i2) in item1.children" :key="item2.id" :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 渲染三级权限 -->
                  <el-col :span="18">
                    <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{ item3.authName }}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>

          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-iocn-edit" @click="editRole(scope.row)">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete" @click="deleteRole(scope.row)">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>


    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightsList" :props="treeProp" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="alotRights">确 定</el-button>
      </span>
    </el-dialog>


    <!-- 添加角色的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addRoleDialogVisible"
      width="50%"
      @close="addRoleReset">
      <el-form :model="addRoleRuleForm" :rules="addRoleRules" ref="addRoleForm" label-width="100px" class="demo-ruleForm">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleRuleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRoleRuleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoleSave">确 定</el-button>
      </span>
    </el-dialog>


    <!-- 编辑角色的对话框 -->
    <el-dialog
      title="编辑角色"
      :visible.sync="editRoleDialogVisible"
      width="50%"
      @close="editRoleDialogClosed">
      <el-form :model="editRoleForm" :rules="editRoleRules" ref="editRoleRef" label-width="100px" class="demo-ruleForm">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleSave">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'Roles',
  data () {
    return {
      // 所有角色列表的数据
      rolesList: [],
      // 控制分配权限的对话框的显示与隐藏，默认为隐藏
      setRightDialogVisible: false,
      // 所有的权限数据
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProp: {
        children: 'children',
        label: 'authName'
      },
      // 默认选中的节点id值数组
      defKeys: [],
      // 当前即将分配权限的角色ID
      roleId: '',
      // 控制添加角色对话框的显示与隐藏
      addRoleDialogVisible: false,
      // 添加角色的表单数据
      addRoleRuleForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加角色的表单验证规则
      addRoleRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 2, max: 10, message: '长度在 2 到 10 个字符', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          { min: 3, max: 20, message: '长度在 3 到 20 个字符', trigger: 'blur' }
        ]
      },
      // 控制编辑角色对话框的显示与隐藏
      editRoleDialogVisible: false,
      // 编辑的角色信息
      roleInfo: {},
      // 编辑角色的表单数据
      editRoleForm: {},
      editRoleRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 2, max: 10, message: '长度在 2 到 10 个字符', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          { min: 3, max: 20, message: '长度在 3 到 20 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取所有的角色列表
    async getRolesList () {
      const { data: res} = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error('获取角色列表失败')
      this.rolesList = res.data
      // console.log(this.rolesList)
    },
    // 根据 id 删除对应的权限
    async removeRightById (role, rightId) {
      const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
      }).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }

      const { data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) return this.$message.error('删除权限失败')
      // this.getRolesList()
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      const { data: res} = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$$message.error('获取权限数据失败')
      this.rightsList = res.data
      // console.log(this.rightsList)

      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有的三级权限的id，并且保存到 defKeys 数组中
    getLeafKeys (node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }

      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async alotRights () {
      const keys = [...this.$refs.treeRef.getCheckedNodes(), ...this.$refs.treeRef.getHalfCheckedNodes()]
      const idStr = keys.join(',')

      const { data: res} = await this.$http.post(`roles/${this.roleId}/rights`, {rids: idStr })
      if (res.meta.status !== 200) return this.$message.error('分配角色权限失败')
      this.$message.success('分配角色权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    },
    // 添加角色，弹出对话框
    addRole () {
      this.addRoleDialogVisible = true
    },
    // 保存添加的角色
    async addRoleSave () {
      const { data: res} = await this.$http.post('roles', {
        roleName: this.addRoleRuleForm.roleName,
        roleDesc: this.addRoleRuleForm.roleDesc
      })
      if (res.meta.status !== 201) return this.$message.error('添加角色失败')
      this.getRolesList()
      this.addRoleDialogVisible = false
      this.$message.success('添加角色成功')
    },
    // 关闭对话框重置表单
    addRoleReset () {
      this.$refs.addRoleForm.resetFields()
    },
    // 编辑角色，弹出对话框
    async editRole (roleInfo) {
      // console.log(roleInfo)
      const { data: res} = await this.$http.get(`roles/${roleInfo.id}`)
      if (res.meta.status !== 200) return this.$message.error('获取角色信息失败')
      this.editRoleForm = res.data

      this.editRoleDialogVisible = true
    },
    // 保存编辑的角色信息
    editRoleSave () {
      this.$refs.editRoleRef.validate(async valid => {
        if (!valid) return

        const { data: res} = await this.$http.put(`roles/${this.editRoleForm.roleId}`, {
          roleName: this.editRoleForm.roleName,
          roleDesc: this.editRoleForm.roleDesc
        })
        if (res.meta.status !== 200) return this.$message.error('编辑角色失败')
        this.getRolesList()
        this.editRoleDialogVisible = false
        this.$message.success('编辑角色成功')
      }) 
    },
    // 编辑对话框关闭重置表单
    editRoleDialogClosed () {
      this.$refs.editRoleRef.resetFields()
    },
    // 删除角色
    async deleteRole (roleInfo) {
      const confirmResult = this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除')
      }

      const { data: res} = await this.$http.delete(`roles/${roleInfo.id}`)
      if (res.meta.status !== 200) return this.$message.error('删除角色失败')
      this.$message.success('删除角色成功')
      this.getRolesList()
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdTop {
  border-top: 1px solid #eee;
}
.bdBottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
